Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Ralph E. Jacobson"'
Autor:
Sophie Triantaphillidou, John R. Jarvis, Robin B. Jenkin, Ralph E. Jacobson, Edward W. S. Fry
Publikováno v:
IQSP
The Modulation Transfer Function (MTF) and the Noise Power Spectrum (NPS) characterize imaging system sharpness/resolution and noise, respectively. Both measures are based on linear system theory but are applied routinely to systems employing non-lin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8320ac32603e032f7fb2bd00733548ce
Autor:
Edward W. S. Fry, Robin B. Jenkin, John R. Jarvis, Ralph E. Jacobson, Sophie Triantaphillidou
Publikováno v:
IQSP
The Noise Power Spectrum (NPS) is a standard measure for image capture system noise. It is derived traditionally from captured uniform luminance patches that are unrepresentative of pictorial scene signals. Many contemporary capture systems apply non
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7069d6ccffb44af39599b3e504d1bb03
https://doi.org/10.2352/issn.2470-1173.2020.9.iqsp-345
https://doi.org/10.2352/issn.2470-1173.2020.9.iqsp-345
Autor:
Sophie Triantaphillidou, Edward W. S. Fry, John R. Jarvis, Robin B. Jenkin, Ralph E. Jacobson
Publikováno v:
IQSP
Spatial image quality metrics designed for camera systems generally employ the Modulation Transfer Function (MTF), the Noise Power Spectrum (NPS), and a visual contrast detection model. Prior art indicates that scene-dependent characteristics of non-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b26f1bf048a41d3403844e8b240f11e
https://doi.org/10.2352/j.imagingsci.technol.2019.63.6.060407
https://doi.org/10.2352/j.imagingsci.technol.2019.63.6.060407
Autor:
Edward W. S. Fry, Robin B. Fagard-Jenkin, Ralph E. Jacobson, John R. Jarvis, Sophie Triantaphillidou
Publikováno v:
IQSP
Imaging system performance measures and Image Quality Metrics (IQM) are reviewed from a systems engineering perspective, focusing on spatial quality of still image capture systems. We classify IQMs broadly as: Computational IQMs (CPIQM), Multivariate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83b8a36acfcc0be477dd15193eaf170f
https://doi.org/10.2352/issn.2470-1173.2018.12.iqsp-231
https://doi.org/10.2352/issn.2470-1173.2018.12.iqsp-231
Publikováno v:
The Imaging Science Journal. 56:189-200
The standard RGB colour space (sRGB) has been proposed as a means for obtaining accurate reproduction of colour and tone for images displayed across the Internet, provided that they are viewed under the reference display and viewing conditions define
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e74f5c7a5f070fff9272f5b4d131d01e
https://doi.org/10.1179/174313108x281362
https://doi.org/10.1179/174313108x281362
Publikováno v:
Journal of Imaging Science and Technology. 51:248-258
The original JPEG compression standard is efficient at low to medium levels of compression with relatively low levels of loss in visual image quality and has found widespread use in the imaging industry. Excessive compression using JPEG however, resu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db5ef5caabcede6b6ccdaa4f872ed86f
https://doi.org/10.2352/j.imagingsci.technol.(2007)51:3(248)
https://doi.org/10.2352/j.imagingsci.technol.(2007)51:3(248)
Publikováno v:
Journal of Imaging Science and Technology. 51:259-270
Image quality assessments have shown that both JPEG and JPEG2000 compression schemes are dependent on scene content. This paper addresses the problem of scene dependency and scene susceptibility in image quality assessments and proposes image analysi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e545480d93b19488ef81db27d070867b
https://doi.org/10.2352/j.imagingsci.technol.(2007)51:3(259)
https://doi.org/10.2352/j.imagingsci.technol.(2007)51:3(259)
Publikováno v:
The Imaging Science Journal. 53:140-148
A theoretical treatment of the effect of quantization upon the determination of modulation transfer functions (MTF) of digital acquisition devices is initially developed for a noiseless system, when using sinusoidal targets. The analytical work shows
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b01c0e88f92a85016bcc8fb0463b6ce1
https://doi.org/10.1179/136821905x50325
https://doi.org/10.1179/136821905x50325
Publikováno v:
The Imaging Science Journal. 50:37-49
This paper explores the influence of the gamut of cathode-ray tube (CRT) display devices on the reproduction of real surface colours. The commonly shown two-dimensional colour gamuts of additive de...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa8763c937aff1124dd756dd0c28760a
https://doi.org/10.1080/13682199.2002.11784390
https://doi.org/10.1080/13682199.2002.11784390
Publikováno v:
The Imaging Science Journal. 50:97-115
This paper reviews the processes involved in the digitization, display and storage of medium-size collections of photographs, using mid-range commercially available equipment. Guidelines for evaluating the performance of these digitization processes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88090b1c3189f09ad3fd42331ef9c01f
https://doi.org/10.1080/13682199.2002.11784395
https://doi.org/10.1080/13682199.2002.11784395